CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 817,368	$ 545,943	$ 791,633
Loan origination fees	185,700	146,118	169,859
Fulfillment fees from PennyMac Mortgage Investment Trust	26,291	27,826	67,991
Loan servicing fees:
Loan servicing fees	1,799,480	1,484,946	1,228,637
Change in fair value of mortgage servicing rights and mortgage servicing liabilities	(433,342)	(605,568)	354,176
Mortgage servicing rights hedging results	(832,483)	(236,778)	(631,484)
Change in fair value of mortgage servicing rights and mortgage-backed securities	(1,265,825)	(842,346)	(277,308)
Net loan servicing fees	533,655	642,600	951,329
Management fees from PennyMac Mortgage Investment Trust	28,623	28,762	31,065
Net interest expense:
Interest income	793,566	632,924	294,062
Interest expense	819,348	637,777	335,427
Net interest expense	(25,782)	(4,853)	(41,365)
Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust	(57)	312	(235)
Results of real estate acquired in settlement of loans	864	1,545	2,510
Repricing of payable to exchanged Private National Mortgage Acceptance Company , LLC unitholders	201		576
Other	26,868	13,403	12,392
Total net revenues	1,593,731	1,401,656	1,985,755
Expenses
Compensation	632,738	576,964	735,231
Loan origination	164,092	114,500	173,622
Technology	149,547	143,152	139,950
Servicing	105,997	69,433	59,628
Professional services	37,992	60,521	73,270
Occupancy and equipment	32,898	36,558	40,124
Marketing and advertising	21,969	17,631	46,762
Legal settlements	1,591	162,770	4,649
Other	45,881	36,496	47,272
Total expenses	1,192,705	1,218,025	1,320,508
Income before provision for income taxes	401,026	183,631	665,247
Provision for income taxes	89,603	38,975	189,740
Net income	$ 311,423	$ 144,656	$ 475,507
Earnings per share
Basic (in dollars per share)	$ 6.11	$ 2.89	$ 8.96
Diluted (in dollars per share)	$ 5.84	$ 2.74	$ 8.5
Weighted-average shares outstanding
Basic (in shares)	50,990	49,978	53,065
Diluted (in shares)	53,356	52,733	55,950
Related Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 4,067	$ (1,784)	$ (16,564)
Loan origination fees	2,503	3,216	8,418
Nonrelated Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	813,301	547,727	808,197
Loan origination fees	183,197	142,902	161,441
Net interest expense:
Interest income	793,566	632,924	294,062
Interest expense	819,348	637,777	335,427
Non-affiliates | Nonrelated Party
Loan servicing fees:
Loan servicing fees	1,529,452	1,268,650	1,054,828
PennyMac Mortgage Investment Trust | Related Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	4,067	(1,784)	(16,564)
Loan servicing fees:
Loan servicing fees	83,252	81,347	81,915
Net interest expense:
Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust	(57)	312	(235)
Others | Nonrelated Party
Loan servicing fees:
Loan servicing fees	$ 186,776	$ 134,949	$ 91,894